Ofc, the alternative is to wait for GK110 towards the end of the year - sure, the 480s will have depreciated in value, but there is more performance to be had at the same price point as a current 680.
I personally don't think we'll see GK110 this year, unless AMD release their next gens relatively early.
Nvidia are dominating the enthusiast market; they have no reason to release another card

